[1] The former name of this family, Hydatinidae (Pilsbry, 1893) has been declared invalid.

[2] The soft parts of animals in this family are brightly colored.

The oval bubble-shaped shell is thin and fragile and has a sunken spire.

The shell is white or beige-colored with colored bands or stripes.

They are specialised feeders, eating cirratulinid polychaete worms.